Create and add net to helmet
Try it with the Tissue addon:

Enable the addon. Create a lowpoly version of your helmet (the size of the pattern will depend on the size of your faces) and create the hexagonal pattern:




In Object mode, select the pattern, then the helmet, and in the N panel &gt; Edit &gt; Tissue Tools &gt; Press Tesselate:



It has created this net, it has some flaws that you can correct. Keep your helmet where it is (or bring the highpoly), make it invisible, select the net, give it a Shrinkwrap modifier with the helmet as Target:



Go in Edit mode and bring some correction to the topology so that you only keep hexagons or kind of, the Shrinkwrap will help to keep the vertices on the surface of the helmet: